Search found 3 matches

by Hugo_NV
Fri Oct 15, 2021 1:16 am
Forum: Hardware
Topic: Issue with ESP32 SD communications using SPI for frequencies other than 20/40MHz.
Replies: 0
Views: 2133

Issue with ESP32 SD communications using SPI for frequencies other than 20/40MHz.

Hi, I am using ESP-WROVER-IE to communicate with an SD card using the VSPI interface. I am basically using the SD card example code from Github, with pins modified to use the default VSPI pins required for my application: [Codebox] #define PIN_NUM_MISO 19 #define PIN_NUM_MOSI 23 #define PIN_NUM_CLK ...
by Hugo_NV
Thu Aug 19, 2021 6:08 am
Forum: Hardware
Topic: Need guidelines: wiring and configuring an external 32Khz oscillator input in EDP-IDF
Replies: 10
Views: 20131

Re: Need guidelines: wiring and configuring an external 32Khz oscillator input in EDP-IDF

Hi ESP_LJH,

Can you provide more details on the results of the testing, specifically the impact of NOT fitting the capacitor to 32K_XP? Have the hardaware design guidelines been updated to show the results of these tests?

Thank you.
by Hugo_NV
Thu Aug 19, 2021 6:06 am
Forum: Hardware
Topic: Need guidelines: wiring and configuring an external 32Khz oscillator input in EDP-IDF
Replies: 10
Views: 20131

Re: Need guidelines: wiring and configuring an external 32Khz oscillator input in EDP-IDF

Hello, we are testing about connecting to an external 32.768 khz oscillator and we will update hardware design guideline later, here are some results for you to refer, clock signal will be input to 32K_XN: 1. sinc wave, 0~3.3 V, with/without cap at 32K_XP, but it is suggested to add cap; 2. square ...